The Uint8Array typed array represents an array of 8-bit unsigned integers.
Questions tagged [uint8array]
162 questions
1
vote
1 answer
Convert [UInt32] -> [UInt8] -> [[UInt8]] in Swift
I am trying to speed up my current implementation of a function that converts [UInt32] to a [UInt8] which in turn is split up into [[UInt8]] with 6 arrays at each index.
My implementation:
extension Array {
func splitBy(subSize: Int) -> [[Element]]…
p0ppy
- 13
- 3
0
votes
0 answers
convert png image to File object in typescript
In my test project I want to convert my png image to Uint8Array. I found some solution
pngFileToUint8Array(pngPath: string): Promise {
const png: File = new File([pngImage], pngPath, { type: 'image/png' });
return new…
Marcin
- 97
- 7
0
votes
1 answer
retriving data from Uint8 array
I have a point data in this format
Uint8Array
(1434544) [170, 189, 128, 65, 141, 54, 182, 65, 218, 50, 12, 192, 61, 247, 134, 194, 242, 169, 128, 65, ...]
It is Uint8Array and represent point data of point cloud in format of x, y, z, and i where…
Pravin Poudel
- 1,433
- 3
- 16
- 38
0
votes
1 answer
why does a Uint8Array() from buffer returns empty?
I am trying to load a font for pdf-lib to use. In order to use it, i must provide a Uint8Array for pdfDoc.embedFont(font);
For some reason, whenever i create the UInt8Array, it returns empty. The ArrayBuffer is returning something so i am quite…
skelyvelocirap
- 3
- 1
0
votes
1 answer
Unable to display Uint8Array in Electron / Nodejs
I've got a big Uint8Array (frame of a camera) encoded in bgra8 that because of reasons I receive as Buffer. I'm adding this information in case someone points out this could be part of the problem:
This is the data when sent:
This is the code of…
user2952272
- 361
- 3
- 18
0
votes
0 answers
Deno convert bmp image file data into a Uint8Array
I am currently trying to load a .bmp image file with Deno and then convert the data of the image into a black/white Uint8Array.
I load the image using:
const imageFile = await Deno.readFile('./path/to/my/image.bmp');
This returns me a Uint8Array,…
Mqx
- 182
- 7
0
votes
1 answer
Convert JavaScript Uint8Array object into Scala Object
A TypeScript application sends a Uint8Array object through an HTTP POST request to a Scala Play application.
How to convert the Uint8Array object into a Scala object in the Play application?
For example, the TypeScript code sends the following…
rapt
- 11,810
- 35
- 103
- 145
0
votes
0 answers
uint8_t element assignment to uint8_t array in C++
I am trying to create a uint8_t array and try to change the first element of the array, then print it to the terminal as a string.
But, after I assign currBlock (changed block) to arr[0], cout gives an error. I tried to find the answer in…
sayonara
- 13
- 4
0
votes
0 answers
Javascript decode Uint8Array with id3 metadata
I am trying to get id3 metadata from hls stream. I can convert Uint8Array to string but the response is still not readable to me. Is there a way to get more readable response?
var o = new…
Toniq
- 4,492
- 12
- 50
- 109
0
votes
1 answer
Return Uint8Array from function
I'm trying to combine two Uint8Array and return the result in this function
commandframe = new Uint8Array([0x01,0x00]); GetCRC16Full(commandframe, true);
function GetCRC16Full(cmd, IsHighBefore) {
let check= [0xff];
var mergedArray = new…
Vince
- 15
- 6
0
votes
0 answers
Convert Uint8Array to a file and save to db
I may be asking the basics just now, sorry.
I want to convert Uint8Array back to a file and save it in db.
Is there anyone who can help me?
document.getElementById('upload_0').onchange = function(event) {
var ext =…
shiraluv
- 1
0
votes
1 answer
How do I convert a List into a viewable image in Flutter?
sample.json is a file containing a list of values from 0 to 100 under a header called "readings":
[
{
"id": 105399,
"time": "2022-11-22 01:25:23.920",
"readings": [
[
0,
2,
…
ianjms
- 9
- 1
0
votes
0 answers
In Flutter, image with buffer(Uint8List) is not displaying with Image.memory
From backend server, I received buffer array like belows.
{
"type": "Buffer",
"data": [
239,
191,
189,
80,
78,
71,
13,
10,
26,
...
]
}
To receive above data, I created a response DTO like…
Jun
- 451
- 4
- 16
0
votes
0 answers
avoid uint8array object conversion in axios,nodejs
I am trying to send uint8array in Axios payload in POST by doing this
app.post('/upload',upload.single('file') ,async function(req, res){
var fileString = fs.readFileSync('./uploads/file.jpeg')
var u8 = new Uint8Array(fileString);
…
Saurabh
- 1,592
- 2
- 14
- 30
0
votes
1 answer
Crop byte array image in swift
I am trying to crop image over UInt8 array. Here is the way I've tried:
func cropImageArray(byteArray: [UInt8], sourceWidth: Int32, bitsPerPixel: Int32, rect: Int32Rect) -> [UInt8] {
var blockSize = bitsPerPixel / 8
var outputPixels =…
fuhr
- 11
- 3